It wasn't Sunday that she visited me, but Monday. - She visited me, not on Sunday, but on Monday.
It wasn't Sunday that she visited me, but Monday.
She visited me, not on Sunday, but on Monday.
He is always at home on Mondays. - He's always at home on Mondays.
He is always at home on Mondays.
He's always at home on Mondays.
... People get excited about Mondays and Thursdays now. ...
... every Mondays and Thursdays. ...